From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBCB4C34024 for ; Mon, 17 Feb 2020 18:52:21 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C25B8207FD for ; Mon, 17 Feb 2020 18:52:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="R/6ysmwv"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=embeddedor.com header.i=@embeddedor.com header.b="zQ8oPudk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C25B8207FD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=embeddedor.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Subject:To:From :Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=ZYGlPsMYnkLgRth9ePfH1BetWhUUa9fMN2xVjL5zei8=; b=R/6ysmwv9wCTaH ars4v93dWXotPrKvgzhTrjiDXjxBD3KDJS91TYhzEB7ld67BEXWY3V51ccK+f+pUeBbFJpzFjm+J8 ogX6WqgdGUV1Fwc8gYb+Lcvmlo7EsLQp0NqRAavXMg3aJsqug83J0oi+fcH7hwtWVCbpJeAP6kQvk rz07bEeK7pbeSoQkTfs9qP2gITyyxAEq08brIQig5cNZhiUFJkCj6lY9j2MIU50Iwx+jx/QdG+WPp PsSkhqqpE0bWGhP8A6RGTD6tBICfk94pMF8njbbOhs9qGbyLzfNl6WhWgnInZVMNjSxXRD764piHg 7syI1+dVMpRAf26rbbYw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j3lV9-0000SE-Vb; Mon, 17 Feb 2020 18:52:15 +0000 Received: from gateway21.websitewelcome.com ([192.185.45.133]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j3lV3-0000CB-UR for linux-arm-kernel@lists.infradead.org; Mon, 17 Feb 2020 18:52:13 +0000 Received: from cm16.websitewelcome.com (cm16.websitewelcome.com [100.42.49.19]) by gateway21.websitewelcome.com (Postfix) with ESMTP id AC0F8400C744F for ; Mon, 17 Feb 2020 12:51:57 -0600 (CST) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id 3lUrjh2518vkB3lUrje031; Mon, 17 Feb 2020 12:51:57 -0600 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=embeddedor.com; s=default; h=Content-Type:MIME-Version:Message-ID:Subject: Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=pnUGrKmSwP1xdfMGfxuU5rNYDt3d/VvDi0iNiDjYuXI=; b=zQ8oPudkLpv67pwJvIPkPvvqvl ZoUX9iGI6gEmfWyvkdqHUf5NbGm2FI/bk2hmZxRRM9Xo4jQMHRz7sMpQOJC6T8A6bj044SlAn64c/ RZlPcfW448DrGj7g+3qEIBRMRrCvbltQRzGtEqneyG0u8CXoIUsbkPODaJlmcR14zgdbrqHCic5bu 5EgHV2Z22guNeohqY5TNumZfQA3H+3pMPFg+cLdt/lSq10Rxw9rp6ZbhKzMBVwKBpzuxIsVapHsem gQO/R+1L0IF6+qQxUlkGkjhF9+WIfsRkFI1sAnzWZYd6zwK/4rsG7MH2YH73roX563Q1bRwDc21kH 0ScxCk0A==; Received: from [200.68.140.26] (port=27428 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.92) (envelope-from ) id 1j3lUq-004D2s-5f; Mon, 17 Feb 2020 12:51:56 -0600 Date: Mon, 17 Feb 2020 12:54:37 -0600 From: "Gustavo A. R. Silva" To: Linus Walleij , Masahiro Yamada Subject: [PATCH] pinctrl: uniphier: Replace zero-length array with flexible-array member Message-ID: <20200217185437.GA20901@embeddedor> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 200.68.140.26 X-Source-L: No X-Exim-ID: 1j3lUq-004D2s-5f X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [200.68.140.26]:27428 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 4 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200217_105210_128020_2819072C X-CRM114-Status: UNSURE ( 9.76 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Gustavo A. R. Silva" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva --- drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c index 57babf31e320..ade348b49b31 100644 --- a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c +++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c @@ -29,7 +29,7 @@ struct uniphier_pinctrl_reg_region { struct list_head node; unsigned int base; unsigned int nregs; - u32 vals[0]; + u32 vals[]; }; struct uniphier_pinctrl_priv { -- 2.25.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel